1/* SPDX-License-Identifier: GPL-2.0-only */
  2/*
  3 * Copyright (c) 2015 Nicira, Inc.
  4 */
  5
  6#ifndef OVS_CONNTRACK_H
  7#define OVS_CONNTRACK_H 1
  8
  9#include "flow.h"
 10
 11struct ovs_conntrack_info;
 12struct ovs_ct_limit_info;
 13enum ovs_key_attr;
 14
 15#if IS_ENABLED(CONFIG_NF_CONNTRACK)
 16int ovs_ct_init(struct net *);
 17void ovs_ct_exit(struct net *);
 18bool ovs_ct_verify(struct net *, enum ovs_key_attr attr);
 19int ovs_ct_copy_action(struct net *, const struct nlattr *,
 20		       const struct sw_flow_key *, struct sw_flow_actions **,
 21		       bool log);
 22int ovs_ct_action_to_attr(const struct ovs_conntrack_info *, struct sk_buff *);
 23
 24int ovs_ct_execute(struct net *, struct sk_buff *, struct sw_flow_key *,
 25		   const struct ovs_conntrack_info *);
 26int ovs_ct_clear(struct sk_buff *skb, struct sw_flow_key *key);
 27
 28void ovs_ct_fill_key(const struct sk_buff *skb, struct sw_flow_key *key);
 29int ovs_ct_put_key(const struct sw_flow_key *swkey,
 30		   const struct sw_flow_key *output, struct sk_buff *skb);
 31void ovs_ct_free_action(const struct nlattr *a);
 32
 33#define CT_SUPPORTED_MASK (OVS_CS_F_NEW | OVS_CS_F_ESTABLISHED | \
 34			   OVS_CS_F_RELATED | OVS_CS_F_REPLY_DIR | \
 35			   OVS_CS_F_INVALID | OVS_CS_F_TRACKED | \
 36			   OVS_CS_F_SRC_NAT | OVS_CS_F_DST_NAT)
 37#else
 38#include <linux/errno.h>
 39
 40static inline int ovs_ct_init(struct net *net) { return 0; }
 41
 42static inline void ovs_ct_exit(struct net *net) { }
 43
 44static inline bool ovs_ct_verify(struct net *net, int attr)
 45{
 46	return false;
 47}
 48
 49static inline int ovs_ct_copy_action(struct net *net, const struct nlattr *nla,
 50				     const struct sw_flow_key *key,
 51				     struct sw_flow_actions **acts, bool log)
 52{
 53	return -ENOTSUPP;
 54}
 55
 56static inline int ovs_ct_action_to_attr(const struct ovs_conntrack_info *info,
 57					struct sk_buff *skb)
 58{
 59	return -ENOTSUPP;
 60}
 61
 62static inline int ovs_ct_execute(struct net *net, struct sk_buff *skb,
 63				 struct sw_flow_key *key,
 64				 const struct ovs_conntrack_info *info)
 65{
 66	kfree_skb(skb);
 67	return -ENOTSUPP;
 68}
 69
 70static inline int ovs_ct_clear(struct sk_buff *skb,
 71			       struct sw_flow_key *key)
 72{
 73	return -ENOTSUPP;
 74}
 75
 76static inline void ovs_ct_fill_key(const struct sk_buff *skb,
 77				   struct sw_flow_key *key)
 78{
 79	key->ct_state = 0;
 80	key->ct_zone = 0;
 81	key->ct.mark = 0;
 82	memset(&key->ct.labels, 0, sizeof(key->ct.labels));
 83	/* Clear 'ct_orig_proto' to mark the non-existence of original
 84	 * direction key fields.
 85	 */
 86	key->ct_orig_proto = 0;
 87}
 88
 89static inline int ovs_ct_put_key(const struct sw_flow_key *swkey,
 90				 const struct sw_flow_key *output,
 91				 struct sk_buff *skb)
 92{
 93	return 0;
 94}
 95
 96static inline void ovs_ct_free_action(const struct nlattr *a) { }
 97
 98#define CT_SUPPORTED_MASK 0
 99#endif /* CONFIG_NF_CONNTRACK */
100
101#if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT)
102extern struct genl_family dp_ct_limit_genl_family;
103#endif
104#endif /* ovs_conntrack.h */